Method and device for transmitting user data through random access response message in mobile communication system

Abstract

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention provides a method and a device for efficiently transmitting user data through a random access response message in a mobile communication system.

1 . A method of operating a terminal in a wireless communication system, the method comprising:
 receiving, from a base station, a paging message comprising a dedicated preamble;   transmitting, to the base station, the dedicated preamble based on the paging message;   receiving, from the base station, a random access response (RAR) message based on the dedicated preamble;   in case that there is user data related to downlink early data transmission (DL EDT) in a non-access-stratum (NAS) container included in the received RAR message, decoding the user data from the NAS container; and   inserting the user data into the message3 and transmitting the same to the base station.   
     
     
         2 . The method of  claim 1 , further comprising transmitting, to the base station, UE capability information comprising an indicator indicating whether or not to support DL EDT using RAR. 
     
     
         3 . The method of  claim 1 , further comprising receiving a physical downlink control channel (PDCCH) to which a separate radio network temporary identity (RNTI) is applied,
 wherein the separate RNTI indicates that the paging message is configured as only the user data related to DL EDT.   
     
     
         4 . The method of  claim 1 , wherein a subheader related to the DL EDT included in the RAR message is located after subheaders that are not related to the DL EDT. 
     
     
         5 . A method of operating a base station in a wireless communication system, the method comprising:
 receiving, from a mobility management entity (MME), a paging comprising user data;   transmitting, to a terminal, a paging message comprising a dedicated preamble;   receiving, from the terminal, the dedicated preamble based on the paging message;   transmitting, to the terminal, a random access response (RAR) message based on the dedicated preamble; and   receiving message3 from the terminal,   wherein in case that there is user data related to downlink early data transmission (DL EDT) in a non-access-stratum (NAS) container included in the RAR message, the user data is decoded by the terminal, and   wherein the decoded user data is inserted into the msg3.   
     
     
         6 . The method of  claim 5 , further comprising receiving, from the terminal, UE capability information comprising an indicator indicating whether or not to support DL EDT using RAR. 
     
     
         7 . The method of  claim 5 , further comprising transmitting a physical downlink control channel (PDCCH) to which a separate radio network temporary identity (RNTI) is applied,
 wherein the separate RNTI indicates that the paging message is configured as only the user data related to DL EDT.   
     
     
         8 . The method of  claim 5 , wherein a subheader related to the DL EDT included in the RAR message is located after subheaders that are not related to the DL EDT. 
     
     
         9 . A terminal comprising:
 a transceiver capable of transmitting and receiving at least one signal; and   a controller connected to the transceiver,   wherein the controller is configured to   receive, from a base station, a paging message comprising a dedicated preamble,   transmit, to the base station, the dedicated preamble based on the paging message,   receive, from the base station, a random access response (RAR) message based on the dedicated preamble,   in case that there is user data related to downlink early data transmission (DL EDT) in a non-access-stratum (NAS) container included in the received RAR message, decode the user data from the NAS container, and   insert the user data into the message3 and transmit the same to the base station.   
     
     
         10 . The terminal of  claim 9 , wherein the controller is further configured to transmit, to the base station, UE capability information comprising an indicator indicating whether or not to support DL EDT using RAR. 
     
     
         11 . The terminal of  claim 9 , wherein the controller is further configured to receive a physical downlink control channel (PDCCH) to which a separate radio network temporary identity (RNTI) is applied, and
 wherein the separate RNTI indicates that the paging message is configured as only the user data related to DL EDT.   
     
     
         12 . The terminal of  claim 1 , wherein a subheader related to the DL EDT included in the RAR message is located after subheaders that are not related to the DL EDT. 
     
     
         13 . A base station comprising:
 a transceiver capable of transmitting and receiving at least one signal; and   a controller connected to the transceiver,   wherein the controller is configured to   receive, from a mobility management entity (MIME), a paging comprising user data,   transmit, to a terminal, a paging message comprising a dedicated preamble,   receive, from the terminal, the dedicated preamble based on the paging message,   transmit, to the terminal, a random access response (RAR) message based on the dedicated preamble, and   receive message3 from the terminal,   wherein in case that there is user data related to downlink early data transmission (DL EDT) in a non-access-stratum (NAS) container included in the RAR message, the user data is decoded by the terminal, and   wherein the decoded user data is inserted into the msg3.   
     
     
         14 . The base station of  claim 13 , wherein the controller is further configured to further comprising receiving, from the terminal, UE capability information comprising an indicator indicating whether or not to support DL EDT using RAR. 
     
     
         15 . The base station of  claim 13 , wherein the controller is further configured to transmit a physical downlink control channel (PDCCH) to which a separate radio network temporary identity (RNTI) is applied,
 wherein the separate RNTI indicates that the paging message is configured as only the user data related to DL EDT, and   wherein a subheader related to DL EDT included in the RAR message is located after subheaders that are not related to the DL EDT.